Refrigeration



Jan.29,1935.- J, G, KWG 1,989,422

` REFRIGERAT ION Filed June 3. 1933 2 Sheets-Sheet 2 INVENTOR ATToR Y;

Patented Jan. 29, 193s BEFRIGEBATION Josse G. xing, Dayton, ohio, signor io r'iigid-l aire Corporation, Dayton, Ohio, a corporation i* g of Delaware Application June 3, 1933, Serial No. 674,240

11 Claims.

This invention relates to refrigeration.

'I'his invention is directed to the cooling of liqand is adapted to be placed and` displayed at the bar, soda fountain or other place where cold drinks are dispensed. This invention is directed to a construction which increases the cooling em- `l ciency of such an apparatus, so that it may be made more compact `and thus require less room where space is of extreme value.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

- In the drawings: l

Fig. 1 is a view, partly in vertical cross-section, and partly diagrammatic of an apparatus embodying features of this invention;

Fig. 2 is an enlarged horizontal cross-sectional view taken along the line 2 -2 of Fig. 1; and

Fig. 3 is an enlarged horizontal view taken along `the line 3-3 of Fig. 1.

An apparatus embodying features of my invention includes, in general, a refrigerant casing 10, in which a body of liquid refrigerant 11 is maintained by a suitable apparatus hereafter to be 36 more fully descbed. A chamber 12, for liquid to be cooled, is so disposed with respect to the refrigerant casing 10, that at least one of its sure faces 13, is exposed to the body of liquid refrig-v erant 11. Preferably, as shown in this'modication, the chamber 12 is wholly disposedwithin the casing 10, so that all of its sides are submerged in the liquid refrigerant. The chamber l2 is provided with a liquid inlet fixture 14 and with a liquid outlet fixture 15, the outlet extending upwardly by means of a pipe 16 to a point near the top of the chamber 12. The outlets 14V and 15 are connect-ed respectively with the pipes 17 and faucet 18, so that the liquid, such as beer from the barrel`19, enters the chamber 12 at 14, is

cooled therein, and is discharged through the pipe 16, outlet 15 and faucet 18.

The apparatus is provided with means for reliquefying and returning refrigerant which is evaporated from the body 11 of liquid refrigerant.

In this particular embodiment, this means includes a refrigerant liquefying unit, generally designated as 20, which unit withdraws evaporated refrigerant from the casing 10 through the outvlet pipe 21, valve fixture 22, pipe 23, from-which .5 pipe the evaporated refrigerant enters the liquefying unit 20. The reliqueed refrigerant is delivered through the pipe 24 through a oat-controlled valve 25, which admits the liquid refrigerant into the body 11, the oat 26A maintaining a substantially constant level of refrigerant in 5 the casing 10. In this particular embodiment, the refrigerant liquei'ying unit 20`includes a compressor 27 which deliverscompressed refrigerant to a condenser 28, which discharges liqueed refrigerant to the receiver 29 from whence refrig- 10 erant flows through the pipe 24 and fixture 25'into the casing 10. The compressor 27 is driven by an electric motor 30.

An automatic control is provided to maintain the body 11 of liquid refrigerant within predeier- 15 mined temperature limits. In this particular embodiment, this control includes a bellows 31 responsive to the vapor-pressure', or temperature, characteristics of the body 11 of liquid refrigerant. This is accomplished by connecting the bellows 20 31 to the evaporated refrigerant line 23. The bellows 31 actuates a snap switch 32 which starts I.

and stops 'the motor 30 in accordance with the vapor-pressine, or temperature, characteristics of the body 11 and maintains the body within pre- 25 determined temperature limits in accordance with the adjustment of the snap switch 32. The. snap switch 32-may be adjusted to maintain the body `11 a few degrees colder than the temperature desired for the liquid io be cooled which is dis- 30 charged through the faucet 18 to compensate for the heat exchange gradient of the chamber 12.

The chamber 12 is constructed in a manner to enhance the emciency of the apparatus and to increase thermal exchange between the liquid 35 within the chamber 12 andthe liquid refrigerant 11. To this end, the chamber 12 is provided with a plurality of pipes 33 which extend into the chamber 12 from the body 11 of liquid refrigerant. Preferably -these pipes 23 are in the form of depending duct loops which .extend downwardly and are formed into loops by the ll construction 34 as indicated in Fig. 1. By this construction, the chamber'12 can be made in the form of a a' vertical cylinder, having bottom 35 secured to the vertical wall by the spun construction 36 as indicated in Fig. 1. The inlet and outlet ttings V14 'and 15 may be secured by soldering or brazing them to the bottom. 35 beforethe top or wall 13 is 50 secured to the cylindrical vertical sides 37. The top 13 has secured theretothe depending duct loops 33, properly brazed or soldered, and there-3 after the top 13 is secured to the sides 37 by the spun'construction 3s indicated in'Fig. 1. Prefer- 55 ably the seams at 36 and 38 are also brazed or soldered; g

The construction abovedescribed, permits liquid refrigerant to enter the duct loops 33 by gravity, and when uncooled liquid entering the chamber 12, the violent evaporation or evolution in the tubes `33 creates an eilicient thermal exchange between the liquid inside of the chamber 12 not only through the outer wallsof the chamber 12 but also through the tubes or duct loops 33. Because the open tops of the duct loops are submerged and the duct loops are vertical they are maintained in a flooded condition with liquid refrigerant. 'Ihis comtruction greatly enhances the thermal exchange capacity of the apparatus and permits a smaller construction than has heretofore been possible.

'I'he casing 10 is preferablymade by providing a cylindrical plated shell 40 to which a plated dome 41 may be soldered or brazed. The casing is supported on the platform 42 which is secured to the plated stand-pipe 43 having a pedestal 44 adapted to rest on the bar, soda fountain or the like.` The outlet fixture at its lower end has a ange 15a,`under which is placed the gasket 15b. The nnge 15a is secured to theplatform .by screws, not shown, passing upwardly through the platform Vinto threaded engagement with the holes 15e in the flange 15a. Also' two or more internally threaded supporting fins 45 which are soldered to the casing 10 are bolted to the platform 42 in a similar manner by bolts or screws 46. By this construction a very ornamental plated constructioncan be provided, in which all of the exposed parts can be readily plated, and, when so A plated, they present a very pleasing appearance.

While the form of embodiment of the invention as herein disclosed, constitutes a preferred form, it is to be understood thatother forms might be which follow.

What is claimed is as follows: -l

1. In a refrigerating apparatus, in combination, a refrigerant casing, Va body of volatile liquid `re- 'frigerant'in said casing, a chamber for liquid to be cooled having a surface exposed toisaid body of liquid` refrigerant, ducts extending into said chamber from said body of liquid refrigerant, inlet and outlet connections on said chamber for liquid to be cooled and means for reducingrthe pressure on said liquid refrigerant to cause it to volatilize at liquid cooling temperatures.

2. In a, refrigerating apparatus, in combination, a refrigerant casing, a body of volatile liquid refrigerant insaid casing, a chamber for liquid to be cooled having a surface exposed to said body of liquid refrigerant, ducts depending into said chamber from said body of liquidrefrigerant, inlet and outlet connections on said chamber for liquid to be cooled and means for'reducing the pressure on said liquid refrigerant to cause it to volatilize at ,liquid cooling temperatures.

3..In a refrigerating apparatus, in combination, arefrigerant casing, a body of volatile liquid refrigerant in said casing, a chamber for liquid V,tobecooledhalllgi?.Surfaceelilloseidtosaidbody of liquid refrigerant, duct loops depending into saidchamber from said bodyof liquid refrigerant,

inlet and outlet connections on said chamber for liquid to be cooled and means for reducing the pressure `on' said liquid refrigerant to cause it to volatilize at lliquid cooling temperatures.

4. In a refrigerating apparatus, in combination, a refrigerant casing, a bodyof volatile liquid refrigerant in 'said casing, means for reliquefylns all coming within the scope of the claims and returning refrigerant evaporated fromgsaid body of liquid refrigerant, `a chamber for liquid tobecooledhavingasurfaceexposedtosaidbody of liquid refrigerant, pipes extending into said chamber from said body of liquid refrigerant, and inlet and outlet connections on said chamber for liquid to be cooled. Y

5. In a refrigerating apparatus, in combination, a refrigerant casing, a body of volatileliquid refrigerant in said casing, means for reliquefying and returning refrigerant evaporated from said body of liquid refrigerant, an automatic control to maintain said body of liquid refrigerant within predetermined temperature limits, a chamber for liquid to be cooled having a surface exposed to said body of liquid refrigerant, pipes extending into said'chamber from said body of liquid refrigerant, and inlet and outlet connections on said chamber for liquid to be cooled.

6. In a refrigerating apparatus, in combination, a refrigerant casing, a body of volatile liquid refrigerant in said casing, a chamber for liquid to be oooid having a surface exposed to sind body of liquid refrigerant, pipes supported from said surface and extending into said chamber from said body of liquid refrigerant and means for reducing the preure on said liquid refrigerant to cause it to volatilize at liquid cooling temf peratures.

7. In a refrigerating apparatus, in combination, a refrigerant casing, a body of volatile liquid refrigerant in said casing, a chamber for liquid to be cooled having a surface exposed to said body of liquid refrigerant, duct loops debending and supported from said surface and,-

said casing -and submerged in said bodyof liquid refrigerant, said chamber having a top wall, pipes secured to said top wall and extending downwardly from said body of liquid refrigerant into 'said chamber, -inlet and outlet connections for liquid to be cooled and means for reducing the pressure`on said liquid'refrlgerant to cause it to volatilize at liquid cooling temperatures.

9. In a refrigerating apparatus, in combination, a. vertically disposed vrefrigerant casing, a body of lvolatile liquid refrigerant in said casing, a chamber for liquid to be cooled disposed within said casing and submerged in said body of liquid refrigerant, said chamber having a top wall, pipes secured tosaid top 'wall and extending downwardly from said body of liquid refrigerant intosaidchamber, inlet and outlet connections for liquid to be cooled, and means for quefying vand returning' evaporated refrigeran from said body of liquid refrigerant.

10. In a refrigerating'apparatus, in combina tion, a vertically disposed cylindrical refrigerant casing, means for maintaining a predetermined level of a body of volatileGliquid 4refrigerant in said casing, a cylindrical chamber for liquid to ,be cooled within said casing and submerged in said body of liquid refrigerant, said chamber having a top wall, pipes secured to said` top wall and extending downwardly from said bodyv of liquid refrigerantinto said chamber, inlet and outlet connections for liquid to be cooled ,achamber for liquidtobecooleddisposedwithin and an evaporated refrigerant outlet above said level. ,f

11. In a refrigerating apparatus, in combination, a vertically disposed cylindrical refrigerant casing, means for maintaining a predetermined level of a body of volatile liquid refrigerant in said casing; a cylindrical chamber for liquid to be cooled disposed within said casing and submerged in said body of liquid refrigerant, said chamber having a top wall, pipes secured to sai top wall and extending downwardly from said body of liquid refrigerant into said chamber, inlet and outlet connections for liquid to be cooled, and an evaporated refrigerant outlet above said 'level means connected to said refrigerant outlet for reliquefying and returning evaporated refrigerant from said body of liquid refrigerant. JESSE G. KING. 

